Injector for steam-boilers.



PATENTED APR. 19, 1904.

T. J. SWBBNY. i INJBGTOR P011 STEAM BOILERS.

APPLICATION FILED .TUNE B, 1903.

N0 MODEL.

` UNiTen STATES Patented April 19, 1904.

PATENT OFFICE.

THOMAS J. SVEENY, OF CLEVELAND, OHIO, ASSICrNORY TO JOHN V. KENNEDY AND ADOLPH S. DEUTSCH, OF CLEVELAND, OHIO.

INJECTOR FOR STEAM-BOILERS.

SPECIFICATION forming part oi' Letters Patent No. 757,849, dated April 19, 1904,

Application iiled June 8, 1903. Serial No. 160.571. (No model.)

T /LZZ wil/0m, it may con/cern.'

Be it known thatLTHoMAs J. SwnnNY,a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful ImproveV ments in Injectors for Steam-Boilers; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to injectors for steamboilers, the object being to construct an injector which provides means for introducing' cold water directly from the water connection to the cold water chamber or condensing'- chamber of the injector atwill when the tem-V perature in this chamber has been increased and thus renders the injector inoperative.

Another object of my. invention is the arrangement of valves and chambers in such a manner as to obtain the best results and render the injector completely under control at all times.

My invention consists, broadly, in providing a valve-controlled cold-water branch connccting' or communicating' at one portion with the cold-water inlet and at the other portion with the cold-water overflow-chamber.

My invention further consists in the arrangement of valves for controlling the cold-water inlet and branch whereby both are controlled from a single stem according to predetermined adjustment.

My invention further consists in other constructive features and combination of parts, all of which will be hereinafter fully set forth, and particularly pointed out in the claims.

In the drawings, Figure I is a longitudinal vertical sectional view illustrating' the interior arrangement of an injector constructed according' to my invention and showing the same with the valves of thc coldwater inlet and the branch both open. Fig. Il is a longitudinal sectional view similar to Fig. I, illustrating' the cold-water inlet and branch valves closed. Fig. III is a sectional view and a plan View illustrating the puppet-valve spring controlled and seat of same for controlling the opening leading' to the coldavater branch.

A represents the barrel or casing of an injector,which has the usual threaded extension B, C, and D for the steam, water, and boiler delivery connections, respectively. The barrel A is divided into steam-chamber E, suction or water chamber F, cold-water overflow-chamber G, and hot water overflow chamber H, the hot-water overflow-chamber H being provided with a valve J, vwhich in turn is provided with a stem J extending through the cap J 2. The object of extending the stem J through the cap is to provide means for determining from the exterior the action of the injector. A small locking jack or lever K is preferably provided for locking the valve J to its seat, which is desirable under certain conditions. rlhe valve J controls communication between the hot-water overfiow-chamber H and an overiiow-pipe H', which communicates With the chamber H when the valve is open through the valve-opening and an annular chamber L, surrounding the barrel A at this point. The usual steam tube or nozzle f, lifting tube or nozzle g, and condensing or delivery tube or nozzle 7' are provided and properly arranged, as illustrated, and the discharging-mouth of the delivery tube or nozzle is provided with a valve-seat y", which when the injector is not in operation is automatically closed by a valve 1'. to prevent backfiow through the injector. The valve k is mounted and guided within a spider-arm 7:/ in a similar manner to that of the valve illustrated in Fig. III of the drawings, thus leaving the delivery end of the injector open with the exception of this slight obstruction. he condensing or delivery tube or nozzle j is provided with openings 3'2 and f3, leading, respectively, into the hot-water overflow-chamber H.

M represents the branch conduit, which leads at its lower end through valve-controlled orifice m into the suction-chamber F and from thence communicates through a valve-controlled orifice with the cold-water inlet-supply C. At the upper end branch conduitM communicates with the cold-water overflow G. A puppet-valve N, spring-controlled and opening inward toward the branch M, is located at the bottom of the conduit M, controlling the passage-way between said branch conduit and the suction-chamber F and cold-water supply C. rlhis valve N closes under normal conditions or working conditions of the injector and opens when cold water is supplied to the branch M.

, A valve O, which is mounted upon a stem O', controls the opening m forthe admission or cut off of cold water. Mounted on the valve-stem O is another valve, which controls the orifice p, communicating between the water-supply C and suction-chamber F. vThe valves O and P are so disposed upon the stem O' that the valve P may be opened considerably in advance of the valve O, and thuscold water be supplied through inlet C to suctionchamber F and cut off from cold-water overflow branch M. rIhe further opening of the valve, however, as illustrated in Fig. I, allows the cold water to pass into branch M and thence into cold-water overiiow G, cooling the water if the same should become overheated through insuflicient supply of coldwater or oversupply of steam or too hig'h pressure of steam. Itis this feature that distinguishes my injector from other injectors, as cold water can be immediately and directly supplied to the cold-water chamber G when the injector becomes inactive, as above set forth, and it is thus that I attain quick and positive action andcontrol of the injector.

The operation of the injector is as follows: The connection B is caused to communicate with the steam-chamber of the boiler. The connection C communicates with the watersupply. The connection D communicates with the boiler at or. below the water-level, and the connection H is an overfiow or escape. Steam being supplied to the chamberE and the valve Al being opened, the steam passes through the steam tube or nozzle f, which, being inserted within the lifting tubelor nozzle g, tends to lift the water into the suction-chamber F, steam thence passing along through the different tubes of the injector until t-he air on the inside of the injector has been expelled and a vacuum secured inside of the workingv barrel, during which operation the valve J may be opened,.or, as a matter of fact, opens of itself. After thevacuum is secured, however, the valve J automatically closes and, if desired, may be locked to its seat with the locking lever or jack K; but this is not absolutely essential if the valve J is air-tight and self-seating.

It is to be understood, of course, that during the above operation the valve Pis opened and the valve D closed. If the water in the chamber Gr should become overheated to such an extent as to render the injector inaccurate or destroy the vacuum or the steam not be condensed, thus stopping the iow of water into the water-chamber of the boiler, the valve O is opened, as illustrated in Fig. I, and cold water supplied to the chamber Gr directly through the branch M until the injector again begins to act, when the valve N will automatically close.

What I claim isl. In an injector, the combination with the main water-inlet, of a branch communicating therewith at one end, and communicating with the cold-water overflow-chamber, at its other end.

2. A steam-injector, comprising a suction-v chamber, steam-chamber, cold and hot water overflow-chambers, and valves for controlling the same, with a main cold-water supply, and separate branch cold-water supply, both valvecontrolled, said branch cold water supply communicating with the main cold-water supply, and with the cold-water overflow-chamber,hsubstantiallyvas and for the purpose set fort 3. In a steam-injector the combination with the cold-water supply-chamber, of a branch communicating with saidV cold-water supplychamber, said branch being provided with a valve adapted to `automatically open inward toward said branch, and a cold-water overflowchamber with which said branch communicates, substantially as and for the purpose set forth. v

4. A steam-injector comprising steam, suction, cold and hot water overflow-chamber, with suitable suction-tubes leading from one to the other of these chambers, a valve located l THOMAS J. SWEENY.

Witnesses:

E. B. DoNNELLY, W. E. DONNELLY. y

IOO 

